THE BKJ-EAHKI) l?AT. 



617 



the teeth have w-shapod erowns with sharp cusps ; the wing is highly 

 specialized, the ulna being reduced to a splint; the interfemoral 

 membrane is complete, reaching nearly or (piite to the tip of the 

 long tail. 



The family is of w^orld-wide distribution, being absent only 

 from some of the smaller islands and the arctic regions. 



Genus Corynorhinus H. Allen. 



Dental formula. — I, ^E^; C, ]^\; Pm, g"!; M, — 36. 



Generic characters. — Ears very long and their bases slightly 

 joined together across the forehead. Tragi long, narrow and 

 pointed. A large glandular protuberance between the eyes and 

 nostrils. 



Skull (fig. 26) slender, with a high, rounded braincase and 

 weak rostral portion. The dentition distinguishes this genus from 



Fig. 26. — Skull of Conjnorhiniis macrotis. After Miller, N. Am. Fauna No. 1.3, 

 Bureau of the Biol. Sur., U. S. Dept. of Agri. 



any other found in Indiana with the exception of Lasioiiycteris, 

 which, however, has short, broad ears and a flat, elongated skull. 



The genus is represented by but one known species, with two 

 subspecies, the entire range being from Central IMexico to the cen- 

 tral part of the United States. Only the typical form is found in 

 Indiana. 



CORYNORHINUS MACROTIS (Le Conte). 

 BIG-EARED BAT. 



Plecotus macrotis Le Conte, ]\[cMurtrie's Cuvier, Animal King- 

 dom, Vol. 1, Appendix, p. 431. 

 Corynorhinus macrotis Butler, Proc. Ind. Acad. Sci. for 1894, p. 

 86, 1895. 



Miller, N. Amer. Fauna, No. 13, p. 51, 1897. 



Diagnostic characters. — Easily distinguished from all other bats 

 found in Indiana by .its enormous ears, which are always more than 

 an inch in length, measured from the crown. 



Description. — The color of the back bears considerable resem-- 



